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Title: Electron energy can oscillate near a crystal dislocation

Crystal dislocations govern the plastic mechanical properties of materials but also affect the electrical and optical properties. However, a fundamental and quantitative quantum field theory of a dislocation has remained undiscovered for decades. Here in this article we present an exactly-solvable one-dimensional quantum field theory of a dislocation, for both edge and screw dislocations in an isotropic medium, by introducing a new quasiparticle which we have called the ‘dislon’. The electron-dislocation relaxation time can then be studied directly from the electron self-energy calculation, which is reducible to classical results. In addition, we predict that the electron energy will experience an oscillation pattern near a dislocation. Compared with the electron density’s Friedel oscillation, such an oscillation is intrinsically different since it exists even with only single electron is present. With our approach, the effect of dislocations on materials’ non-mechanical properties can be studied at a full quantum field theoretical level.
 [1] ;  [2] ;  [3] ;  [1]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Mechanical Engineering
  2. Boston College, Chestnut Hill, MA (United States). Dept. of Physics; Boston Univ., MA (United States). Dept. of Physics
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Physics and Dept. of Electrical Engineering and Computer Sciences
Publication Date:
Grant/Contract Number:
SC0001299; FG02-09ER46577
Published Article
Journal Name:
New Journal of Physics
Additional Journal Information:
Journal Volume: 19; Journal Issue: 1; Journal ID: ISSN 1367-2630
IOP Publishing
Research Org:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); Defense Advanced Research Projects Agency (DARPA)
Country of Publication:
United States
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; quantum field theory; crystal dislocation; Friedel oscillation; disordered system
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1341260; OSTI ID: 1366537